Name Block Date _ Earth Science Web quest Directions: Answer each of the following questions on a separate sheet. Part 1àClick on Plate Movement/ earthquake and volcanoes ON Mrs. Ms McNamara's website 1. Click on “Maps.” Check the boxes for boundaries, volcanoes, earthquakes, hotspots and velocities. What correlations do you see? Where the plates are converging there are many earthquakes and volcanoes What seems to have no relationship? Hotspots do not occur along plate boundaries necessarily because they are in other areas as well. 2. Click on “Motion.” Move the plates to see how they have changed over time. What do the black lines represent? The current shore lines of all the present day land masses are the black lines How about the green areas? The green areas include the outline of the actual land masses including their underwater portions. 3. Click on “Details.” a. What is oceanic-continent subduction? Oceanic-continent subduction occurs when cool, dense lithospheric subduction beneath a continental lithospheric plate What is a continental volcanic arc? A continental volcanic arc a chain of volcanoes formed by a subducting plate And what are some examples? The Andes and the Cascade region of the United States are examples of an oceanic-continent subduction. b. What is a continent-continent collision? A collision between 2 continental plates which takes place where a subduction zone once existed and where an oceanic plate carried with it continent is a continent-continent collision What are some examples? The Himalayan mountain range and the Tibetan plateau are examples of a continent-continent collision c. What is ocean-ocean subduction? Cold dense lithosphere being sub ducted beneath another oceanic lithospheric plate in an ocean-ocean subduction What are some examples? Island arcs including japan, the Philippines and the Aleutians of Alaska are examples of an ocean to ocean subduction. d. What is a continental rift? The continent breaks apart and in some cases new ocean forms in the rift where the plates are diverging where a continental rift occurs What are some examples? Lake Victoria and the red sea are examples of bodies of water created by a continental rift. e. What is a mid-ocean ridge? The separation of 2 oceanic plates to form new oceanic lithosphere is the mid-ocean ridge How is it like a conveyor belt? It is like a conveyor belt because as the lithosphere moves away from the ridge new lithosphere is created as the old moves away f. What is a continental transform? It occurs when 2 plates are sliding past each other and tear the region apart into faults What is an example? An example is the San Andreas Fault g. What is an oceanic transform? Straight faults with deformation occurring only in the region close to the fault – and only between spreading ridge segments h. What are oceanic hot spots? It is an area where rock rises from deep in the mantle flows upward and heats the surrounding rock. Only the volcano over the current location will be active. What are some examples? Some examples are the Hawaiian Islands i. What are continental hot spots? Hot spots which erupt onto the continental lithosphere are continental hotspots What are some examples? An example is the Yellowstone super volcano. Part 2àClick on “Interactive Volcano” on Mrs. McNamara’s website 1. Click on Global Perspective. What are tectonic plates? The earth’s plates that are separated into large sections which fit together are called tectonic plates 2. Click on “Ring of Fire” (bottom right corner). What is the “Ring of Fire”? One of the world’s most active volcano zones is called the Ring of Fire 3. Click on “Layers Within.” What are they? The layers within are the inner layers of the earth. Starting from the center it is the inner core, outer core, lower mantle, upper mantle and crust 4. Click on “Volcano Types.” What are the 3 types of volcanoes? Describe each type. Stratovolcano which is a volcano which is built up form layer upon layer of viscous magma, it has steep sides and is tall in height/ the cinder cone volcano is another type which is small with steep sides and built up from layers of ejected rock fragments. Also there are shield volcanoes which are broad and sloping and usually build up from the sea floor 5. Click on “Inside a volcano.” Draw a picture of the inside of a volcano and label the different parts These are the included parts central vent, fissure, hardened lava layer, ash deposit layer, crater, dike 6. Click on “Build your own volcano and watch it erupt.” How do viscosity and gas factor in volcanoes? Viscosity and gas are factors in the shape and explosiveness of a volcano 7. Click on “viscosity info”. What is it? Viscosity is the thickness of magma 8. Click on “gas info.” What is it? The gas info is the gas content of the magma which depends on the amount of water and carbon dioxide 9. Now try your hand at varying the conditions of the volcano and starting the eruption. Fill in the chart below.
Earth Science Web quest
Directions: Answer each of the following questions on a separate sheet.
Part 1àClick on Plate Movement/ earthquake and volcanoes ON Mrs. Ms McNamara's website
1. Click on “Maps.” Check the boxes for boundaries, volcanoes, earthquakes, hotspots and velocities. What correlations do you see?
Where the plates are converging there are many earthquakes and volcanoes
What seems to have no relationship?
Hotspots do not occur along plate boundaries necessarily because they are in other areas as well.
2. Click on “Motion.” Move the plates to see how they have changed over time. What do the black lines represent?
The current shore lines of all the present day land masses are the black lines
How about the green areas?
The green areas include the outline of the actual land masses including their underwater portions.
3. Click on “Details.”
a. What is oceanic-continent subduction?
Oceanic-continent subduction occurs when cool, dense lithospheric subduction beneath a continental lithospheric plate
What is a continental volcanic arc?
A continental volcanic arc a chain of volcanoes formed by a subducting plate
And what are some examples?
The Andes and the Cascade region of the United States are examples of an oceanic-continent subduction.
b. What is a continent-continent collision?
A collision between 2 continental plates which takes place where a subduction zone once existed and where an oceanic plate carried with it continent is a continent-continent collision
What are some examples?
The Himalayan mountain range and the Tibetan plateau are examples of a continent-continent collision
c. What is ocean-ocean subduction?
Cold dense lithosphere being sub ducted beneath another oceanic lithospheric plate in an ocean-ocean subduction
What are some examples?
Island arcs including japan, the Philippines and the Aleutians of Alaska are examples of an ocean to ocean subduction.
d. What is a continental rift?
The continent breaks apart and in some cases new ocean forms in the rift where the plates are diverging where a continental rift occurs
What are some examples?
Lake Victoria and the red sea are examples of bodies of water created by a continental rift.
e. What is a mid-ocean ridge?
The separation of 2 oceanic plates to form new oceanic lithosphere is the mid-ocean ridge
How is it like a conveyor belt?
It is like a conveyor belt because as the lithosphere moves away from the ridge new lithosphere is created as the old moves away
f. What is a continental transform?
It occurs when 2 plates are sliding past each other and tear the region apart into faults
What is an example?
An example is the San Andreas Fault
g. What is an oceanic transform?
Straight faults with deformation occurring only in the region close to the fault – and only between spreading ridge segments
h. What are oceanic hot spots?
It is an area where rock rises from deep in the mantle flows upward and heats the surrounding rock. Only the volcano over the current location will be active.
What are some examples?
Some examples are the Hawaiian Islands
i. What are continental hot spots?
Hot spots which erupt onto the continental lithosphere are continental hotspots
What are some examples?
An example is the Yellowstone super volcano.
Part 2àClick on “Interactive Volcano” on Mrs. McNamara’s website
1. Click on Global Perspective. What are tectonic plates?
The earth’s plates that are separated into large sections which fit together are called tectonic plates
2. Click on “Ring of Fire” (bottom right corner). What is the “Ring of Fire”?
One of the world’s most active volcano zones is called the Ring of Fire
3. Click on “Layers Within.” What are they?
The layers within are the inner layers of the earth. Starting from the center it is the inner core, outer core, lower mantle, upper mantle and crust
4. Click on “Volcano Types.” What are the 3 types of volcanoes? Describe each type.
Stratovolcano which is a volcano which is built up form layer upon layer of viscous magma, it has steep sides and is tall in height/ the cinder cone volcano is another type which is small with steep sides and built up from layers of ejected rock fragments. Also there are shield volcanoes which are broad and sloping and usually build up from the sea floor
5. Click on “Inside a volcano.” Draw a picture of the inside of a volcano and label the different parts
These are the included parts central vent, fissure, hardened lava layer, ash deposit layer, crater, dike
6. Click on “Build your own volcano and watch it erupt.” How do viscosity and gas factor in volcanoes?
Viscosity and gas are factors in the shape and explosiveness of a volcano
7. Click on “viscosity info”. What is it?
Viscosity is the thickness of magma
8. Click on “gas info.” What is it?
The gas info is the gas content of the magma which depends on the amount of water and carbon dioxide
9. Now try your hand at varying the conditions of the volcano and starting the eruption. Fill in the chart below.